Grubs ruining Apples

[align=left]I have a small garden apple tree, I really don't know the specific kind but the apples are good enough for cooking with.

I've started to have a problem with grubs eating the apples and causing them to rot and drop off a lot of the time.

Is there anything I can do to remedy the situation? Any sort of sprays or preventative measures to stop the grubs eating my apples!!

Thanks for your help in advance, this is my first forum post here
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One of these might help.
http://www.gardening-naturally.com/acatalog/Codling_Moth_Trap_and_Refill.html